Dissntegrating-mill



(No Model.)

G. ELBREG.

DISINTEGRATING MILL.

ruw Phowmnogmpmr, wnmngmn. D. C.

FFICE@ GEORGE ELBREG, OF COLUMBUS, OHIO.

DISENTEGRTING=IVIILL- SPECIFICATION forming part of Letters Patent No.273,829, dated March 13, 1883.

Application filed June 2, 1882. (No model.)

To all whom 'it may concern Be it known that I, GEORGE ELBREG, a citizenof the United States, and a resident of Columbus, in the countyoi'Franklin and State of Ohio, have invented certain new and usefulImprovements in Disintegrating-Mills, of which the following is aspecification.

This invention relates to improvements in mills for disintegratingbones, burnt clay, and other hard substances 5 and the objects ofmyinvention are to provide a novel construction of the disintegratiugshells or wheels, whereby it a portion ot the same becomes injured orbroken it can be readily replaced, and to provide a simple and efficientmeans for strengthening the shells or wheels and preventing the materialbeing operated on escaping laterally from the shells or wheels. Theseobjects I accomplish by the construction of parts illustrated in theaccompanying drawings, in which- Figure l is a central verticalsectional View of a machine embodying my invention; Fig. 2, a detachedelevation ofthe shells or wheels carried by one of the disks; Fig. 3, aperspective View of two of the segmental sections united by bolts orrivets.

A A represent the frame on which the mill is mounted; a, a',thejournal-caps for the millshatts; B B, the driving-pulleys mounted onshafts b b.

On shaft b are mounted two annular grinding shells or wheels, cc', whichare provided with slots or passages I. rlhese annular shells are made insegments of the form shown in Fig. 3. Each segmentoi' the shell isprovided with a segmentalflange, O, which projects inwardly from oneedge ofthe shell, and by which it is united to disk C by rivetsor boltso. The disk O is firmly secured to the shaft b by means ot' a hub. Outhe opposite shaft` b', are mounted two similar annular disintegratingshells. D D', which are made of segments on the plan similar to thatshown in F1g. 3, being provided with similar openings, I, iianges D2,and the disk and hub C. The two sets ot' disintegrating annular shells DD and c o are arranged to run concentrically t0 each other in oppositedirections, as indicated by the arrows in Fig. l, one set of thedisintegrators being a counterpart of the other.

j represents segmental grooves drilled in the edges of segments c c'.When the segments are united to complete the annulus, the bolts orrivetsj are inserted and fastened.

In order to secure the parts firmly together, metal hoops or bands c areshrunk upon the outer periphery of each of the annular shells D D c c.

g represents rings or Iilling -pieces on the edges ol' the flanges c o'D D', to till thespace betweenr the parts enough to prevent the materialfrom working ont laterally from between the shells.

Great difficulty has been encountered hitherto in constructing and usingdisintegratingmills of this class for grinding burnt clay and other hardsubstances because of the breaking ot' the metal. Again, theimpossibility of repairing when broken has made the renewing ofthe partsexceedingly costly but when the mill is made in sections united as hereshown it can be made of Bessemer or other similar casting steel, whichmakes the mili materially stronger and more durable, and at the sametime, should one of the sections break, it can be repaired at smallcost, comparatively.

H represents the hopper, from which the materialis fed into the millthrough the eye in the center ofthe shell over shaft b.

h represents an apron, attached tothe under side ofthe hopper H, tocover the opening in the center ot' the shells below the hopper to holdthe material inthe mill.

F represents a break-bar attached to frame A by means ot' a key, f,anditprojects through apron h into the inner shell to assist in reducingthe material, so that it will pass through opening I in the shell D.

The mill operates similar to other mills oi' thisclass; but, being madeot' strong material and more durable, it is capable ot" being revolvedat much greater speed, and hence becomes more effective.

I claim-n l. Thecombination of the annular disintegrating shells orwheels, composed of a series of segmental sections, each having aninwardly-projecting segmental flange, with the vertically-arrangeddisks, having their peripheries detachably united with the danges on thesegmental sections, substantially as described.

2. The combination, with the annular disinterial escaping laterallyfrom` the shells or tegrating shells or wheels, composed of a sewheels,substantially as described. ries of segmental sections, each providedwith In testimony whereof I have hereunto set my an inwardly-projectingsegmental Harige, and hand in the presence of two subscribing wit- 5 thevertically-arranged disks deftachaloly connesses.

Iected 'with the said flanges, o the exterior annular' hoops or bandsfor strengthening` the GEORGE ELBREG' segmental sections of the annularshells or Witnesses: Wheels, and the interior projectiifg einnulzuIELLIOTT B. BLISS7 1o rings or filling-pieces for preventing the malCEAS. E. MILLER.

